Engine mods for 4.0

[Southpaw]

Where should I start on trying to get the most power out of my stock 1999 Explorer 4.0 OHV? What bolt on's first or exuast? What's first for my truck and so on.

 

[have2goski]

depends on a couple things like which engine and how much $ do you wanna spend

intake
exhaust
chip
maf
tb
headers
supercharger

you need to use the 'search' function a bit. Tons of info here if you look around a bit. There have been hundreds of threads with the exact same question you have asked. you can also search for a member on here named troll, his power numbers will blow your mind

welcome to the site